This previously unseen photo of Angelina Jolie will be auctioned on May 15

The mother-of-six also serves as a special envoy for the UN High Commissioner for Refugees and recently joined forces with Foreign Secretary William Hague in announcing £23m funding from G-8 nations to go towards a series of measures for preventing sexual violence and ensuring justice for its survivors.

Jolie welcomed the "long overdue stand" on sexual violence, saying that for too long international political will to prevent it has been "sorely lacking."

Angelina Jolie & Brad Pitt

Angelina Jolie & Brad Pitt

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Angelina Jolie & Brad Pitt

Brad Pitt and Angelina Jolie attend 'In the Land Of Blood And Honey' Pairs premiere on February 16, 2012 in Paris, France.